![Array Assignment](http://cdn.sstatic.net/stackoverflow/img/apple-touch-icon@2.png?v=73d79a89bded&a)
Introductory C Programming -- Assignments. Here are the problem sets I hand out during each of the eight weeks this class runs when I teach it in person. If you're out there on the net somewhere, unable to attend the class in person, feel free to follow along here! Assignment Answers. Week 7. Topics: array/pointer equivalence, memory allocation, more about strings Assignment.
Let me explain with an example - #include <iostream> void foo( int a[2], int b[2]) // I understand that, compiler doesn't bother about the // array index and.
However, it is not legal to assign string variables, because you cannot assign to an entire array. myString = 'xyz'; // ILLEGAL: Cannot assign to an array. Furthermore, you cannot do comparisons like this. However, for this particular assignment you are prohibited from using the C-string library itself. (Do not use #include <string.h> in your code.) Your assignment.
NOTE: We must associate a pointer to a particular type: You can't assign the address of a short int to a long int, for instance. Consider the effect of the following code: int x = 1, y = 2; int *ip; ip = &x; y = *ip; x = ip; *ip = 3; It. Pointers and arrays are very closely linked in C. Hint: think of array elements arranged in consecutive memory locations. Consider the following: int a[10], x; int *pa; pa = &a[0]; /* pa pointer to address of a[0].
Array Assignment C++
The answer is in the concept "pass by value", which means that the called function receives copies of the arguments -- which are pointers to ints. So a and b are local copies of those pointers (which don't exist in the caller; they were the results of conversions from the arrays, that is, the addresses of their first elements). It would be no different if you wrote void foo( int aparam[2], int bparam[2] ) { int* a = aparam; int* b = bparam; a = b ; } Dennis Ritchie has acknowledged that the array syntax for parameters is a wart on the language, and was only there to ease conversion of B programs -- ancient history! It also had a deleterious effect on the design of C++, because arrays cannot be passed by value. This syntax is a constant source of confusion. So ... don't use it; pretend it's not legal. If everyone does that, it can fade away and maybe in a few decades can be given proper semantics. Update: For more information on call-by-value (the only form of call in C and Java; see my comments below), call-by-reference (added in C++), and other evaluation strategies, see http://en.wikipedia.org/wiki/Evaluation_strategy','url':'http://stackoverflow.com/questions/5279082/array-assignment','og_descr':'Let me explain with an example - #include void foo( int a[2], int b[2] ) // I understand that, compiler doesn't bother about the // array index and
This tutorial describes arrays and shows how they work in C#. Sample Files. See Arrays Sample to download and build the sample files discussed in this tutorial.